FEAT #6490 add testU and MVC slim for convert

core/Controllers/DocserverController.php

core/Test/ResControllerTest.php

core/class/class_resource.php

modules/convert/Controllers/ProcessConvertController.php

modules/convert/Controllers/ProcessFulltextController.php

modules/convert/Models/ProcessConvertModelAbstract.php

modules/convert/Models/ProcessFulltextModelAbstract.php

modules/convert/Test/ProcessConvertTest.php

modules/convert/Test/ProcessFulltextTest.php

modules/convert/convert.sql

phpunit.xml